content: /* ===========================================================
   * JFreeChart : a free chart library for the Java(tm) platform
   * ===========================================================
   *
   * (C) Copyright 2000-2012, by Object Refinery Limited and Contributors.
   *
   * Project Info:  http://www.jfree.org/jfreechart/index.html
   *
   * This library is free software; you can redistribute it and/or modify it
   * under the terms of the GNU Lesser General Public License as published by
   * the Free Software Foundation; either version 2.1 of the License, or
   * (at your option) any later version.
   *
   * This library is distributed in the hope that it will be useful, but
   * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
   * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
   * License for more details.
   *
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301,
   * USA.
   *
   * [Oracle and Java are registered trademarks of Oracle and/or its affiliates.
   * Other names may be trademarks of their respective owners.]
   *
   * (C) Copyright 2012, by Michael Clarke and Contributors.
   *
   * Original Author:  Michael Clarke;
   *
   */
  
  package org.jfree.chart.axis;
  
  import java.io.Serializable;
  import java.util.Comparator;
  
  public class NumberComparator implements Comparator<Number>, Serializable {
  
      @Override
      public int compare(Number o1, Number o2) {
          if (o1 == null) {
              if (o2 == null) {
                  return 0;
              }
              return 1;
          }
          if (o2 == null) {
              return -1;
          }
          return ((Double) o1.doubleValue()).compareTo(o2.doubleValue());
      }
  }
  